Most of the time, it's not about the characters but more about the words. If you want to say more in only 140 characters you have to fit more words in, which means using shorter words... and that's why 99% of Twitter users sound like idiots, even though most of them probably are not.

Doesn't seem to be working. I'm fairly verbose, nothing I ever want to say fits in 140 characters. I'm better off not reading what DOES fit. (140)

This version reads to me as almost irritated, as if you're ranting about something.

This might be a situation I'd abandon the post completely because there's no way to communicate my post in the proper tone and context.

To be fair, I WAS ranting :)